Phone Interview pre scheduled with 2 interviewers. After 3 weeks invitation for face to face interview with 4 interviewers at company office. After face to face interview the feedback was to be submited after a few weeks, but a long delay happened and they ended up on postponing hiring for this position according to the email they sent me.

there were three interviews: phone, with local supervisor and HR, with reginal manager and HRs. you can prepare the interview by searching the possible interview questions online. but the common question asked to me during these three interviews was: give an example of the difficulty you encountered and how you overcame it.